Method for treating 1,3-propanediol concentrated bacterial liquid

A technology of concentrated bacterial solution and treatment method, which is applied in natural water treatment, chemical instruments and methods, neutralized water/sewage treatment, etc., can solve the problems affecting the industrialization process and difficult treatment of concentrated bacterial solution, and achieve low treatment cost , Simple operation, good settling effect

Active Publication Date: 2011-01-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no literature report on the treatment of "three wastes", especially the treatment of concentrated bacterial liquid is a difficult point, if it is not solved, it will affect the industrialization process of the project

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) First, the bacteria in the fermentation broth are separated with a ceramic membrane, and the obtained concentrated bacteria fluid is 1 / 5 of the volume of the original fermentation broth;

[0020] 2) Take 50ml of the concentrated bacterial solution and dilute it 10 times with river water;

[0021] 3) Under normal temperature conditions, add 5ml of compound medicine to the solution obtained in step 2), add 5mol / L NaOH solution to adjust the pH value to 10.0, and then add 4ml of 1‰ polyacrylamide solution while stirring;

[0022] 4) After standing for 10 minutes, the precipitate was removed by vacuum filtration to obtain a clear liquid, and the filtration time was 10 minutes.

Embodiment 2

[0024] 1) First, the bacteria in the fermentation broth are separated with a ceramic membrane, and the obtained concentrated bacteria fluid is 1 / 5 of the volume of the original fermentation broth;

[0025] 2) Take 50ml of the concentrated bacterial solution and dilute it 7 times with distilled water;

[0026] 3) Under normal temperature conditions, add 4ml of compound medicine to the solution obtained in step 2), add 5mol / L NaOH solution to adjust the pH value to 10.0, and add 2.8ml of 1‰ polyacrylamide solution while stirring;

[0027] 4) After standing for 10 minutes, the precipitate was removed by vacuum filtration to obtain a clear liquid, and the filtration time was 15 minutes.

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PUM

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Abstract

The invention relates to a method for processing 1,3-propanediol concentrated bacterial liquid. The method comprises the following steps: separating thalli in fermentation liquid through membrane filtration, wherein membrane filtration equipment can select and use fibrous membrane, ceramic membrane or stainless steel membrane; adding water into the concentrated bacterial liquid according to a volume ratio of 1:1 to 20 for dilution; at normal temperature, adding a compound medicament into the diluted bacterial liquid according to a volume ratio of 100:0.2 to 2, and adding an alkaline substance to regulate the pH value to 9-12, wherein the compound medicament is the aqueous solution of ferrous sulphate and polymer ferric sulfate, the mass of the ferrous sulphate is 10 to 30%, the mass of the polymer ferric sulfate is 10 to 30, and the balance is water; then adding one per mill polyacrylamide solution according to a volume ratio of 100:0.1-1; and settling for 5 to 30 min and filtering. The method has the advantages of simple process, easy operation, low treatment cost and good flocculation and settlement effect, which is applicable to the treatment of the production of 1,3-propanediol concentrated bacterial liquid by fermentation method.

Description

Technical field: [0001] The invention relates to the "three wastes" treatment technology of microbial fermentation liquid, in particular to a treatment method for concentrated bacterial liquid in the process of producing 1,3-propanediol by microbial fermentation. Background technique: [0002] 1,3-propanediol (English name 1,3-Propanediol, referred to as 1,3-PD) is an important chemical raw material, which can be used as solvent, antifreeze or protective agent, fine chemical raw material and new polyester (such as PTT) and polyurethane monomers. Compared with polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), which is a new polyester material synthesized from terephthalic acid, polytrimethylene terephthalate (PTT) has With many excellent properties, it is a new type of polyester material with wide application prospects. [0003] At present, the production method of 1,3-propanediol is mainly chemical synthesis method, the raw material used is non-renewab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/44C02F1/52C02F1/66C02F103/36
Inventor 徐友海吕继萍刘海军董鑫金刚刘姜
Owner PETROCHINA CO LTD
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